Document deployment in batch mode with airflow

[Galileo-Galilei]

Deploying kedro pipelines saved as Mlflow Models is a commonly required feature, as can be seen in the original repo Galileo-Galilei/kedro-mlflow#241.

This issue will keep track of expected documentation to deploy in batch mode with an orchestrator. Given the traction about airflow (Galileo-Galilei/kedro-mlflow#44) and its popularities, this will be the one used for the example